Oct. 21 (Bloomberg) -- Shares of the following companies
had unusual moves in U.S. trading. Stock symbols are in
parentheses and prices are as of 4 p.m. in New York.

Accretive Health (AH US) surged 12 percent, the most since
Nov. 22, to $22.66. The company that helps hospitals collect
medical bills was raised to “buy” from “neutral” at Goldman
Sachs Group Inc. after the shares fell below a 12-month price
estimate or $31. “The overwhelming need for hospitals to
improve profitability will accelerate traction for billing and
collection outsourcing specialists,” Sebastian Paquette, a
Goldman Sachs analyst, wrote in a note.

Acme Packet Inc. (APKT US) slumped 20 percent, the most
since July 2008, to $30.37. The maker of devices to transmit
phone calls and video said third-quarter earnings excluding some
items were 21 cents a share, missing the average analyst
estimate by 1 cent, Bloomberg data show.

Altera Corp. (ALTR US) rose 12 percent, the most since
February 2008, to $37.05. The maker of programmable
semiconductors forecast fourth-quarter sales that were
“slightly better than expectations,” Barclays Plc said in a
note.

Biogen Idec Inc. (BIIB US) gained 7.1 percent to $108.84,
the highest price since June 29. The pharmaceutical company said
its experimental multiple sclerosis drug BG-12 “significantly”
reduced relapses in a clinical trial.

Calix Inc. (CALX US) slumped 18 percent, the most since its
initial public offering, in March 2010 to $6.82. The
communications software developer reported third-quarter profit
excluding some items of 7 cents a share, trailing the average
analyst estimate by 1 cent in a Bloomberg survey.

Chipotle Mexican Grill Inc. (CMG US) gained 8.3 percent,
the most since October 2010, to $333.49. The Denver-based
restaurant chain reported a 25 percent gain in third-quarter
profit as traffic and prices increased.

General Electric Co. (GE US) dropped 1.9 percent, the most
in the Dow Jones Industrial Average, to $16.31. The world’s
largest maker of jet engines reported third-quarter profit that
failed to beat analyst forecasts for the first time since 2008,
as tighter profit margins in industrial businesses from energy
to aviation overshadowed growth led by the finance unit.

Harman International Industries Inc. (HAR US) rose the most
in the S&P 500, jumping 21 percent to $43. The maker of audio
systems for homes and vehicles reported first-quarter sales and
profit that beat analysts’ estimates.

Honeywell International Inc. (HON US) advanced 5.8 percent
to $51.28, the highest price since Aug. 3. The diversified
technology and manufacturing company reported third-quarter
earnings climbed 44 percent, driven by a recovery in commercial
aerospace, and increased its full-year forecast.

LyondellBasell Industries NV (LYB US) climbed 13 percent,
the most intraday since emerging from bankruptcy protection last
year, to $31.02. The chemical maker said it plans to pay a
special dividend of as much as $2.6 billion as it refinances
debt.

McDonald’s Corp. (MCD US) rose 3.7 percent to $92.32, the
highest price since at least 1980. The world’s biggest
restaurant chain said third-quarter was $1.45 a share, beating
the $1.43-average of analyst estimates in a Bloomberg survey as
lower-priced items boosted U.S. store sales.

MGIC Investment Corp. (MTG US) sank 5.7 percent to $2.30
for the biggest decline since Oct. 17. The largest U.S. mortgage
insurer reported a third-quarter net loss of 82 cents a share,
its fifth straight quarterly loss, as the cost of claims from
mortgage defaults rose amid a deepening U.S. housing slump.

Premiere Global Services Inc. (PGI US) rose 14 percent, the
most since Aug. 29, to $8.77. The provider of business
communications and data services increased its full-year profit
and sales forecasts.

SanDisk Corp. (SNDK US) increased 9.4 percent to $49.76,
the highest price since April 27. The maker of flash-memory
cards had third-quarter earnings of $1.20 a share, beating the
$1.06 average of analysts surveyed by Bloomberg. Revenue matched
estimates, data show.

Seagate Technology Plc (STX US) surged 28 percent, the most
since at least December 2002, to $15.42. The world’s largest
maker of computer disk drives reported first-quarter earnings
excluding some item of 34 cents a share, beating the average
analyst estimate by 8.3 percent, Bloomberg data show. The
company had its rating raised at ThinkEquity Partners and Robert
W. Baird & Co.

Synaptics Inc. (SYNA US) rallied 19 percent, the most since
January 2005, to $32.18. The maker of touch pads for digital
music players and electronic devices reported first-quarter
profit that exceeded analysts’ estimates and said it will buy
back as much as $100 million of its stock.